Buggy code:
protected Object createMethodReference ( Object receiver , List arguments ) throws InvalidInputException { } protected Object createReturnStatement ( ) { } protected void createTag ( ) { } protected Object createTypeReference ( int primitiveToken ) { } protected TypeDeclaration getParsedTypeDeclaration ( ) { } protected boolean parseReturn ( ) { } protected void parseSimpleTag ( ) { } protected boolean parseTag ( int previousPosition ) throws InvalidInputException { boolean valid = false ; int token = readTokenAndConsume ( ) ; if ( ( this . index ) >= ( this . scanner . eofPosition ) ) { this . tagSourceStart = previousPosition ; this . tagSourceEnd = this . tokenPreviousPosition ; if ( this . reportProblems ) this . sourceParser . problemReporter ( ) . javadocInvalidTag ( this . tagSourceStart , this . tagSourceEnd ) ; return false ; } this . tagSourceStart = this . scanner . getCurrentTokenStartPosition ( ) ; this . tagSourceEnd = this . scanner . getCurrentTokenEndPosition ( ) ; char pc = peekChar ( ) ; boolean validTag = false ; switch ( token ) { case TerminalTokens . TokenNameIdentifier : case TerminalTokens . TokenNamereturn : case TerminalTokens . TokenNamethrows : case TerminalTokens . TokenNameabstract : case TerminalTokens . TokenNameassert : case TerminalTokens . TokenNameboolean : case TerminalTokens . TokenNamebreak : case TerminalTokens . TokenNamebyte : case TerminalTokens . TokenNamecase : case TerminalTokens . TokenNamecatch : case TerminalTokens . TokenNamechar : case TerminalTokens . TokenNameclass : case TerminalTokens . TokenNamecontinue : case TerminalTokens . TokenNamedefault : case TerminalTokens . TokenNamedo : case TerminalTokens . TokenNamedouble : case TerminalTokens . TokenNameelse : case TerminalTokens . TokenNameextends : case TerminalTokens . TokenNamefalse : case TerminalTokens . TokenNamefinal : case TerminalTokens . TokenNamefinally : case TerminalTokens . TokenNamefloat : case TerminalTokens . TokenNamefor : case TerminalTokens . TokenNameif : case TerminalTokens . TokenNameimplements : case TerminalTokens . TokenNameimport : case TerminalTokens . TokenNameinstanceof : case TerminalTokens . TokenNameint : case TerminalTokens . TokenNameinterface : case TerminalTokens . TokenNamelong : case TerminalTokens . TokenNamenative : case TerminalTokens . TokenNamenew : case TerminalTokens . TokenNamenull : case TerminalTokens . TokenNamepackage : case TerminalTokens . TokenNameprivate : case TerminalTokens . TokenNameprotected : case TerminalTokens . TokenNamepublic : case TerminalTokens . TokenNameshort : case TerminalTokens . TokenNamestatic : case TerminalTokens . TokenNamestrictfp : case TerminalTokens . TokenNamesuper : case TerminalTokens . TokenNameswitch : case TerminalTokens . TokenNamesynchronized : case TerminalTokens . TokenNamethis : case TerminalTokens . TokenNamethrow : case TerminalTokens . TokenNametransient : case TerminalTokens . TokenNametrue : case TerminalTokens . TokenNametry : case TerminalTokens . TokenNamevoid : case TerminalTokens . TokenNamevolatile : case TerminalTokens . TokenNamewhile : validTag = true ; } tagNameToken : while ( ( token != ( TerminalTokens . TokenNameEOF ) ) && ( ( this . index ) < ( this . scanner . eofPosition ) ) ) { switch ( pc ) { case '}' : case '*' : break tagNameToken ; case '!' : case '#' : case '%' : case '&' : case '\'' : case '"' : case ':' : case '<' : case '>' : readChar ( ) ; this . tagSourceEnd = this . scanner . getCurrentTokenEndPosition ( ) ; validTag = false ; break ; default : if ( ( pc == '<seq2seq4repair_space>' ) || ( Character . isWhitespace ( pc ) ) ) break tagNameToken ; this . tagSourceEnd = this . scanner . getCurrentTokenEndPosition ( ) ; token = readTokenAndConsume ( ) ; } pc = peekChar ( ) ; } if ( ! validTag ) { this . tagSourceEnd = this . scanner . getCurrentTokenEndPosition ( ) ; if ( this . reportProblems ) this . sourceParser . problemReporter ( ) . javadocInvalidTag ( this . tagSourceStart , this . tagSourceEnd ) ; return false ; } int length = ( ( this . tagSourceEnd ) - ( this . tagSourceStart ) ) + 1 ; char [ ] tag = new char [ length ] ; System . arraycopy ( this . source , this . tagSourceStart , tag , 0 , length ) ; this . index = ( this . tagSourceEnd ) + 1 ; this . scanner . currentPosition = ( this . tagSourceEnd ) + 1 ; this . tagValue = JavadocTagConstants . NO_TAG_VALUE ; switch ( token ) { case TerminalTokens . TokenNameIdentifier : if ( length == 0 ) break ; switch ( tag [ 0 ] ) { case 'c' : if ( CharOperation . equals ( tag , JavadocTagConstants . TAG_CATEGORY ) ) { this . tagValue = JavadocTagConstants . TAG_CATEGORY_VALUE ; <START_BUG> valid = parseIdentifierTag ( ) ; <END_BUG> } break ; case 'd' : if ( CharOperation . equals ( tag , JavadocTagConstants . TAG_DEPRECATED ) ) { this . deprecated = true ; valid = true ; this . tagValue = JavadocTagConstants . TAG_DEPRECATED_VALUE ; } break ; case 'e' : if ( CharOperation . equals ( tag , JavadocTagConstants . TAG_EXCEPTION ) ) { this . tagValue = JavadocTagConstants . TAG_EXCEPTION_VALUE ; valid = parseThrows ( ) ; } break ; case 'i' : if ( CharOperation . equals ( tag , JavadocTagConstants . TAG_INHERITDOC ) ) { if ( ( this . astPtr ) == ( - 1 ) ) { this . inheritedPositions = ( ( ( long ) ( this . tagSourceStart ) ) << 32 ) + ( this . tagSourceEnd ) ; } valid = true ; this . tagValue = JavadocTagConstants . TAG_INHERITDOC_VALUE ; } break ; case 'l' : if ( CharOperation . equals ( tag , JavadocTagConstants . TAG_LINK ) ) { this . tagValue = JavadocTagConstants . TAG_LINK_VALUE ; if ( ( this . inlineTagStarted ) || ( ( this . kind ) == ( AbstractCommentParser . COMPLETION_PARSER ) ) ) { valid = parseReference ( ) ; } else { valid = false ;

Fix:
valid = parseIdentifierTag ( false ) ;